body,div,h1,h2,h3,h4,h5,h6,p,ul{
  margin: 0;
  padding: 0;
  box-sizing:border-box;
}
.clearfix::after{
  content:'';
  display: block;
  clear: both;
}
html,body{
  height: 100%;
  width: 100%;
}
.icon {
  width: 1em; height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
  overflow: hidden;
}